Commercial Real Estate Eyed as Looming Trouble Spot

With many U.S. homeowners still feeling the crush of mortgages that exceed the value of their property, experts say another real estate crisis is rapidly approaching - this time in the commercial sector.

Elizabeth Warren, the chairwoman of the TARP Congressional Oversight Panel, told CNBC this week that around half of all commercial mortgages will be underwater by the end of 2010, posing a "very serious problem" for the economy over the next three years.

On Tuesday, Treasury Secretary Timothy Geithner echoed that concern on CNBC, but said the issue could be solved.

"Commercial real estate's still going to be a problem for the country. But we can manage through this process," he said.

Both Geithner and Warren said the commercial real estate troubles will affect mostly smaller banks.

"We now have 2,988 banks--mostly midsized, that have these dangerous concentrations in commercial real estate lending," Warren told CNBC.